<template>
  <div class="upload-file">
    <a-upload
      ref="fileUploadRef"
      multiple
      :action="uploadFileUrl"
      :file-list="fileList"
      :limit="limit"
      :show-file-list="true"
      :headers="headers"
      class="upload-file-uploader"
      :data="uploadData"
      :on-before-upload="handleBeforeUpload"
      @error="handleUploadError"
      @exceed-limit="handleExceed"
      @success="handleUploadSuccess"
    >
      <a-button type="primary">选取文件</a-button>
    </a-upload>
    <!-- 上传提示 -->
    <div v-if="showTip" class="arco-upload-tip">
      请上传
      <template v-if="fileSize">
        大小不超过
        <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为
        <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>
  </div>
</template>

<script setup lang="ts">
import { Message } from "@arco-design/web-vue";
import { propTypes } from "@/utils/propTypes";
import { globalHeaders } from "@/utils/request";

const baseUrl = import.meta.env.VITE_APP_BASE_API;

const props = defineProps({
  modelValue: [String, Object, Array],
  // 数量限制
  limit: propTypes.number.def(5),
  // 大小限制(MB)
  fileSize: propTypes.number.def(5),
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: propTypes.array.def(["doc", "xls", "ppt", "txt", "pdf", "png", "jpg", "jpeg"]),
  // 是否显示提示
  isShowTip: propTypes.bool.def(true),
  attactId: {
    type: [String, Number],
    required: true,
    default: ""
  }
});

const uploadData = reactive<AttactUploadOption>({
  attactId: props.attactId,
  grantType: "minio"
});

const { proxy } = getCurrentInstance() as ComponentInternalInstance;

const emit = defineEmits(["update:modelValue"]);
const fileUploadRef = ref<ArcoUploadInstance>();

const uploadFileUrl = ref(baseUrl + "/file/attactmentInfo/upload"); // 上传文件服务器地址
const fileList = ref<any[]>([]);

const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize));
const headers = ref(globalHeaders());
const number = ref(0);
const uploadList = ref<any[]>([]);

watch(
  () => props.modelValue,
  async val => {
    if (val) {
      let temp = 1;
      // 首先将值转为数组
      let list = [];
      if (Array.isArray(val)) {
        list = val;
      } else {
        // const res = await listByIds(val as string);
        // list = res.data.map((oss) => {
        //   return {name: oss.originalName, url: oss.url, ossId: oss.ossId};
        // });
      }
      // 然后将数组转为对象数组
      fileList.value = list.map(item => {
        item = { name: item.name, url: item.url, ossId: item.ossId };
        item.uid = item.uid || new Date().getTime() + temp++;
        return item;
      });
    } else {
      fileList.value = [];
      return [];
    }
  },
  { deep: true, immediate: true }
);

const handleBeforeUpload = (file: any) => {
  // 校检文件类型
  if (props.fileType.length) {
    const fileName = file.name.split(".");
    const fileExt = fileName[fileName.length - 1];
    const isTypeOk = props.fileType.indexOf(fileExt) >= 0;
    if (!isTypeOk) {
      Message.error(`文件格式不正确, 请上传${props.fileType.join("/")}格式文件!`);
      return false;
    }
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      Message.error(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  number.value++;
  return true;
};

// 上传失败
const handleUploadError = () => {
  Message.error("上传文件失败");
};

// 文件个数超出
const handleExceed = () => {
  Message.error(`上传文件数量不能超过 ${props.limit} 个!`);
};

// 上传成功回调
const handleUploadSuccess = (res: any, file: UploadFile) => {
  if (res.code === 200) {
    uploadList.value.push({
      name: res.data.fileName,
      url: res.data.url,
      ossId: res.data.ossId
    });
    uploadedSuccessfully();
  } else {
    number.value--;
    // fileUploadRef.value?.handleRemove(file);
    uploadedSuccessfully();
  }
};

// 上传结束处理
const uploadedSuccessfully = () => {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;
    emit("update:modelValue", listToString(fileList.value));
  }
};

// 对象转成指定字符串分隔
const listToString = (list: any[], separator?: string) => {
  let str = "";
  separator = separator || ",";
  list.forEach(item => {
    if (item.ossId) {
      str += item.ossId + separator;
    }
  });
  return str != "" ? str.substring(0, str.length - 1) : "";
};

// 获取文件名称
const getFileName = (name: string) => {
  // 如果是url那么取最后的名字 如果不是直接返回
  if (name.lastIndexOf("/") > -1) {
    return name.slice(name.lastIndexOf("/") + 1);
  } else {
    return name;
  }
};

// 删除文件
const handleDelete = (index: number) => {
  let ossId = fileList.value[index].ossId;
  // delOss(ossId);
  fileList.value.splice(index, 1);
  emit("update:modelValue", listToString(fileList.value));
};

watch(
  () => props.attactId,
  attactId => {
    uploadData.attactId = attactId;
  }
);
</script>
